[INCH-POUND]
HH-I-558C
January 7, 1992
(TO SUPERSEDE)
HH-1-558B
November 22, 1971
FEDERAL SPECIFICATION
INSULATION,, BLANKETS, THERMAL
(MINERAL FIBER, INDUSTRIAL TYPE)
This specification is approved by the Commissioner, Federal Supply Service,
General Services Administration, for the use of all Federal agencies.
1. SCOPE AND CLASSIFICATION
1.1 Scope. This specification covers industrial mineral fiber
insulation.
1.2 Classification.
1.2.1 Form, type, classes. The flexible blanket mineral fiber insulation
shall be of the following form, type and classes, as specified (see 6-1), for
other forms, types and classes see 6-2:
Form B - Blankets and felts, flexible.
Type I - Blankets flexible.
Class 7 - For use at temperatures up to and including 450 deg. F.
Class 8 - For use at temperatures from 451 deg. F. up to and
including 1000 deg. F.
1.2.2. Sizes. Mineral fiber insulation shall be of the sizes listed in
table I, as specified (see 6.1).
2. APPLICABLE DOCUMENTS
2.1 The documents referenced In this Federal specification shall be the
issues in effect on the date of issuance of the invitation for bids or
request for proposal unless otherwise specified.
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³Beneficial comments, recommendations, additions, deletions, ³
³clarifications, etc. and any data which may improve this document³
³should be sent to: General Service Administration, Engineering ³
³Group (7FXEE), 819 Taylor St., Fort Worth, TX 76102 ³
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DISTRIBUTION STATEMENT A: Approved for
public release; distribution is unlimited. FSC 5640
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